package cc.kzc.adminauth.auth;

import java.util.Arrays;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

import cc.kzc.adminauth.redis1.cache.LoginUserCache;
import lombok.extern.slf4j.Slf4j;

@Slf4j
@Configuration
@EnableWebSecurity
public class SecurityConfig {

	@Value("${svr.permit.apis}")
	private String[] permitApis;

	@Autowired
	private UserDetailsService userDetailsService;

	@Autowired
	private LoginUserCache loginUserCache;

	/**
	 * 安全过滤器，配置 URL 的安全配置
	 * 
	 * <pre>
	 * anyRequest          |   匹配所有请求路径
	 * access              |   SpringEl表达式结果为true时可以访问
	 * anonymous           |   匿名可以访问
	 * denyAll             |   用户不能访问
	 * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
	 * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
	 * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
	 * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
	 * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
	 * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
	 * permitAll           |   用户可以任意访问
	 * rememberMe          |   允许通过remember-me登录的用户访问
	 * authenticated       |   用户登录后可访问
	 * </pre>
	 */
	@Bean
	public SecurityFilterChain defaultSecurityFilterChain(HttpSecurity http) throws Exception {

		log.info("permit paths -> {}", Arrays.asList(permitApis));

		http
				// 基于 token，不需要 csrf
				.csrf().disable()
				// 禁用默认登录页
				.formLogin().disable()
				// 禁用默认登出页
				.logout().disable()
				// 基于 token，不需要 session
				.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
				// 下面开始设置权限
				.and().authorizeHttpRequests((authorizeRequests -> {
					authorizeRequests
							// 允许路径
							.antMatchers(permitApis).permitAll()
							// 其他全部认证
							.anyRequest().authenticated();
				}))
				// 添加过滤器
				.addFilterBefore(new JwtAuthenticationTokenFilter(loginUserCache),
						UsernamePasswordAuthenticationFilter.class)
				// 过滤未授权的处理
				.exceptionHandling().authenticationEntryPoint(new UserAuthenticationEntryPoint())
				// 认证用户时用户信息加载配置，注入springAuthUserService
				.and().userDetailsService(userDetailsService);
		return http.build();
	}

	@Bean
	public AuthenticationManager authenticationManager(AuthenticationConfiguration authenticationConfiguration)
			throws Exception {
		return authenticationConfiguration.getAuthenticationManager();
	}

	@Bean
	public PasswordEncoder passwordEncoder() {
		return new BCryptPasswordEncoder();
	}

}